Discussions By Condition: Sexual conditions

Spotting

Okay so about 4 days ago i noticed a light light bleeding discharge, it lasted for about 2 1/2 days, and today its starting to come back. I dont expect my period for another week. I've been doing research and thinking and i know we had sex about 10/8 days before and then 4 and two days before as well (once twice in one day..) could the spotting be a result from too much sex or could it be a sign that i am pregnant. I have also been extreamly tired and very moody, but this is also about the time i get PMS..what should i do?!